package com.astar.controller;

import com.astar.config.CaptchaConfig;
import com.google.code.kaptcha.impl.DefaultKaptcha;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;

@RestController
@Api(tags = "CaptchaController")
public class CaptchaController {

    @Resource
    private DefaultKaptcha defaultKaptcha;

    @ApiOperation("验证码")
    @GetMapping(value = "/captcha",produces = "image/jpeg")
    public void captcha(HttpServletRequest request, HttpServletResponse response){
        //定义response输出类型为image/jpeg类型
        response.setDateHeader("Expires",0);
        response.setHeader("Cache-Control","no-store,no-cache,must-revalidate");
        response.addHeader("Cache-Control","post-check=0,pre-check=0");
        response.setHeader("Pragma","no-cache");
        response.setContentType("image/jpeg");

        //生成验证码
        String text = defaultKaptcha.createText();
        System.out.println("验证码:"+text);
        request.getSession().setAttribute("captcha",text);
        //根据文本内容创建图形验证吗
        BufferedImage image =defaultKaptcha.createImage(text);
        ServletOutputStream outputStream = null;
        try {
            outputStream = response.getOutputStream();
            // 输出流输出图片
            ImageIO.write(image, "jpg", outputStream);
            outputStream.flush();
        }catch (IOException e){
            e.printStackTrace();
        }finally {
            try {
                if(null != outputStream){
                    outputStream.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }

        }

    }

}
